Self-lubricating spring.



.1. & A. F. PINE. SELF LUBRICATING SPRING. APPLICATION FILED SEPT. 29.ISIS- Patented Apr. 9,1918.

UNITED A PATEN WILBER J. PINE, or osHKosH, wrscoNsIN, AND ARTHUR F.PINE, or CASTLE nocx,

- COLORADO.

SELF-LUBRICATING SPRING.

Specification of Letters iatent.

Patented A pr. 9, 1918.

Application filed September 29, 1916. Serial No. 122,788.

1 all whom it may concern:

Be it. known that we, \VILBERJ. PINE and v .series, but does not projectfar enough to An'rmm F. PINE, citizens of the United States, residing.respectively, at Oshkosh, county-of lVinncbago, and State. of Wisconsin,and Castle'Rock. county of Douglas, and

State of Colorado, have invented new and useful Improvements inSelf-Lubricating Springs, of which the following s a specification.

Our invention relates toi nprovement-s in self lubricating springs.

The object of our invention is to provide 'means whereby an adequatesupply of lubricant may be maintained not only 1n a reservoir whichsupplies it to the several leaves of the spring, but also in a set ofauxiliary reservoirs between the'respective leaves of the spring,whereby proper distribution of the lubricant to all contacting-faces ofthe spring leaves is assured.

In'the drawings:

Figure 1 is a side elevation of a vehicle spring embodyin our invention,with dotted lines indicating t e auxiliary reservoirs and thedistributing ducts, one end of the spring however being partially brokenaway.

.Fig. 2 i a fragmentary view of one of the leaves as seen from the underside.

Fig. 3 is a cross sectional view, drawn on line 3, 3 of Fig.- 1.

Fig. 4 is a longitudinal sectional view, (fragmentary) drawn on line 4,4 of Fig. 2.

Like parts are referred to by the same reference numerals throughout theseveral views. l.

The main leaf 1 of our improved vehicle spring is provided .with eyes 2at its ends in accordance with the usual practice. This mainleaf 1 isreinforced by auxiliary leaves 3 and 4 and 5 and 6 respectively. In thedrawin the auxiliary leaves 3 and 4 are shown below the main spring andthe leaves 5 and 6 aboe it, but we make no .claim to this feature in thepresent application, and for the purpose hereof the arrangement of theauxiliary or reinforcing leaves may be regarded as following ordinarypractice.

' It will be observed, however, that the central ortion of each leaf isprovidedwith a longitudinal recess 10 on one-side and a correspondingbulge 11 on the other side,

preferably formed by longitudinally corru-' gating the leaf between theclamping clips 12, shown in Fig. 1. The bulging portion or side of eachcorrugation fits into the recess of the corrugation in the next leaf ofthe reach the base of the recess 10. Therefore a small cavity 13 isprovided between the surface of each bulge 11 and the wall of the recess10 which constitutes the base por-. tion of the recess. The recesses 10are preferably formed in the underside of each leaf and the bulgingportions 11 are therefore on the upper side, but it is not essential toour invention, it being largely immaterial in which direction the leavesare corrugated. We prefer to bulge them upwardly the better tofacilitate adequate distribution of the lubricant. as hereinafterexplained.

A cup shaped reservoir 15 is adapted to receive-a quantity of lubricantto which pres sure may be applied by means of a cap 17 screwed upon orinto thecup. The cup is provided with a shank 18 which is screwed intothe upper member of thespring. This member comprising, in theconstruction shown, a clamping plate 19, having its under. surfacerecessed to receive the upwardly bulging portion of the upper springleaf 6. A feed duct 20 extends downwardlythrough the ccnter of therespective leaves. and with the cavities 13 forms a continuous passagefor the lubricant through the several leaves to the lower one. The lowerleaf may also be perforated in case a bottom clamping plate 2-3 isemployed. 7

It will he observed that the recesses 10 are substantially half oval inshape, tapering toward their-respective ends and communicating at eachend with a longitudinal groove .25, which extends outwardly toward theend of the spring in each case. The length of this groove is notmaterial. except that we preferably do not extend it to the extreme end.of the spring. c also prefer to have the groove terminate substantiallyat. the point where tlexion, under ordinary conditionS, is sufliciont tocause distribution of oil or other lubricant by reason of theniovementof the leaves. I

The shank 18 ot' the reservoir 15 is tubula! and communicates directlywith the sevoral cavities 13 and ducts 20. Therefore by filling thereservoir with a suitable lubricant and screwing'down the cap saidlubricant formity over the rounded surfaces of the vlcsd mth an 011 154%tion, 65 a leaf 1 1011, w. sfm one one $116 next.

and

m-ciox wads .0 3 mug psi-hon ong 0110 i1 an 0i mm of hires, 1.

ng ongv mtian.

ends,

ns 01 h and haw 111131 from the, non, and me for prisin :pri si eitwa .11 1 p dong (me :36

projkctm Wifl'l Juhu' shank Lpmtmes and a recessed and s and t0 ch leafiJ-e- 79 1e h? :1 t0 feed d nrlbuted LIVE meant leaf.

'h a. 10: a1 par bu gafim of 118 same '(Wxded 'Witn mantra.

1 part comprising 10 eavcs, mach (K1 n r a mi art mvi

ing

comyrlsin in r ts respea 61 WE ntm ad prcvld gatwn mtcr 1nd eac .sess

g so .1 Wu

:ldap

cance antral p ed with a. l nlts central spaces dis rovi

and an th is cent of y be ing, 0

Xten

nt-s c 2 the cent leaves. 5pm ones 0 asses.

HP prov rd wh p rmigh es e etwe Ld mung," a ent All 21 ion gram caf 410wb 1011:; of -h4bri( 'iie b M21 in the .wid marligzztum, ea

apcrtured p vommunmahng With said rm 5 xr am rvscrmu' nit. thmugh m m.031d rim:

g em

ricaih' 0215 son an each g a race O eservnlr mon W146}? xes g out. 6comrug ai s mung B Lit) nd we .rE-V

Lin 1h wave Q 1(1 poked ommu he 111;; P01

was 12 ing 0e m lwanca harem 0.5

mlg

d in

partial 21.}

1 prev .10 ends PQHZ by the uccomp;

Qvi

. the

to 5:) p. ovjc 0:1 sirFe n S Q 0

